?

Wick Company made a contract in writing to hire Zake for
five years for $150,000 per year. After two years, Zake asked
Wick for a raise of $20,000 per year. Wick at first refused but
agreed to pay Zake a $60,000 bonus after Zake completed the
fifth year of work. Zake put some pressure on Wick to get Wick
to agree to these terms. After the fifth year, Zake left and demanded
Wick pay Zake the $60,000 bonus and Wick refused.
Zake sued Wick for the $60,000 bonus. Who wins?